Which Sprinkler heads do not need melting to set off the water? How is the K-factor for sprinkler heads determined? These factors could cause the sprinkler heads not to activate in a fire.

Central is providing newer fire sprinklers that do not use O-ring seals, and is voluntarily . New Central Brass Bronze Upright Sprinkler Head A-17-A17804a. Rasco Automatic Sprinkler 1degree quick response K factor 5. New Central Brass Bronze Sprinkler Head Ssp804a 19Gb. However, it must be emphasized that Reliable sprinklers must be installed.